# Frequency Counter With Arduino

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## Introduction: Frequency Counter With Arduino

This is a simple and cheap arduino based frequency Counter cost less than 4\$ it been very useful to measure small circuits

2. Jumper cables
3. 16*2 lcd
4. Ic 555
5. 1uf cap

## Step 3: Connection to Arduino

Follow up the schematic and connect lace and potentiometer to arduino

## Step 4: Copy the Same Code to the Adruino Sketch and Upload

#include ,

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

const int pulsePin = 8; // Input signal connected to Pin 8 of Arduino

int pulseHigh; // Integer variable to capture High time of the incoming pulse

int pulseLow; // Integer variable to capture Low time of the incoming pulse

float pulseTotal; // Float variable to capture Total time of the incoming pulse

float frequency; // Calculated Frequency

void setup() { pinMode(pulsePin,INPUT);

lcd.begin(16, 2);

lcd.setCursor(0,0);

lcd.print("stark labs");

lcd.setCursor(0,1);

lcd.print(" Freq Counter ");

delay(5000); }

void loop() { lcd.setCursor(0,0);

lcd.print("Frequency is ");

lcd.setCursor(0,1);

lcd.print("stark labs ");

pulseHigh = pulseIn(pulsePin,HIGH);

pulseLow = pulseIn(pulsePin,LOW);

pulseTotal = pulseHigh + pulseLow; // Time period of the pulse in microseconds frequency=1000000/pulseTotal; // Frequency in Hertz (Hz)

lcd.setCursor(0,1);

lcd.print(frequency);

lcd.print(" Hz");

delay(500); }

## Step 5: Making of Frequency Generator

simple follow this schematic and connect those connections properly many people have problem in that 1uf capacitor will give 800hz-40khz and 101 capacitor will give 50hz-4khz

## Step 6: Finalizing the Project

After you make the 2 schematic connect them together as shown in schematic and this is link for demo of the device https://www.youtube.com/watch?v=t25wPzo6lWc

## 1 Person Made This Project!

• ## Recommendations

Pin 15 serially with resistor of 220 Ohms to +, pin 16 to - (ground) for background led is necessary. Otherwise you are seeing - nothing.
Modified program:
#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
const int pulsePin = 8; // Input signal connected to Pin 8 of Arduino
int pulseHigh; // Integer variable to capture High time of the incoming pulse
int pulseLow; // Integer variable to capture Low time of the incoming pulse
float pulseTotal; // Float variable to capture Total time of the incoming pulse
float frequency; // Calculated Frequency
void setup() {
pinMode(pulsePin,INPUT);
lcd.begin(16, 2);
lcd.setCursor(0,0);
lcd.print("stark labs");
lcd.setCursor(0,1);
lcd.print("Freq Counter");
delay(500);
}
void loop() {
lcd.setCursor(0,0);
lcd.print("Frequency is ");
lcd.setCursor(0,1);
lcd.print(" ");
pulseHigh = pulseIn(pulsePin,HIGH);
pulseLow = pulseIn(pulsePin,LOW);
pulseTotal = pulseHigh + pulseLow; // Time period of the pulse in microseconds frequency=1000000/pulseTotal; // Frequency in Hertz (Hz)
frequency=1000000/pulseTotal; // Frequency in Hertz (Hz)
lcd.setCursor(0,1);
lcd.print(frequency);
lcd.print(" Hz ");
delay(200);
}